AND TALKING PREMIUM+ Instruction Manual page 9

Symbols
Symbols that are printed on the device case
Symbols
R6(LR6,AA)
SN
IP
Symbols that are printed on the AC adapter
Symbols
Function/Meaning
Standby and Turn the device on.
Battery installation guide
Direct current
Type BF: Device, cuff and tubing are designed to provide special
protection against electrical shocks.
Serial number
Refer to instruction manual/booklet
Polarity of DC jack
International Protection Symbol
Keep dry
Function/Meaning
Alternating current
Direct current
Polarity of DC jack
Class II device
For indoor use only
UL/cUL certification device label
Energy efficiency level VI certification device label
International protection symbol
E-9